Before loading or unloading hazardous materials, what is the first thing you must do?

Set the parking brake and make sure the vehicle will not move. Section 9.4.1: Before loading or unloading, set the parking brake. Make sure

Before loading or unloading hazardous materials, what is the first thing you must do?

ANSWER BREAKDOWN
  • A. Incorrect. "Call your dispatcher" is not correct. Before loading or unloading, set the parking brake. Make sure the vehicle will not move.
  • B. Correct. Before loading or unloading, set the parking brake. Make sure the vehicle will not move.
  • C. Incorrect. "Put on your hazard flashers" is not correct. Before loading or unloading, set the parking brake. Make sure the vehicle will not move.
  • D. Incorrect. "Open all doors for ventilation" is not correct. Before loading or unloading, set the parking brake. Make sure the vehicle will not move.